This moves `get_migration_status` to its own file in
zerver/lib/migration_status.py. This is a prep work to refactor the
check migration function of import/export later on.
Some of the imports are moved into `get_migration_status` because we're
planning to share this file with `check-database-compatibility` which is
also called when one does `production-upgrade`, so we'd want to avoid
doing file-wide import on certain types of modules because it will fail
under that scenario.
In `test_fixtures.py`, `get_migration_status` is imported within
`Database.what_to_do_with_migrations` so that it is called after
`cov.start()` in `test-backend`. This is to avoid wierd interaction with
coverage, see more details in #33063.
Fixes#33063.
Generated by `pyupgrade --py3-plus --keep-percent-format` on all our
Python code except `zthumbor` and `zulip-ec2-configure-interfaces`,
followed by manual indentation fixes.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This is a preparatory commit for using isort for sorting all of our
imports, merging changes to files where we can easily review the
changes as something we're happy with.
These are also files with relatively little active development, which
means we don't expect much merge conflict risk from these changes.
This should mean that maintaining two Zulip development environments
using the same Git checkout no longer has caching problems keeping
track of the migration status.
Previously, the generate-fixtures shell script by called into Django
multiple times in order to check whether the database was in a
reasonable state. Since there's a lot of overhead to starting up
Django, this resulted in `test-backend` and `test-js-with-casper`
being quite slow to run a single small test (2.8s or so) even on my
very fast laptop.
We fix this is by moving the checks into a new Python library, so that
we can avoid paying the Django startup overhead 3 times unnecessarily.
The result saves about 1.2s (~40%) from the time required to run a
single backend test.
Fixes#1221.
